package com.example.demo4.service;

import com.example.demo4.pojo.Student;

import java.util.List;
import java.util.Map;

public interface StudentService {
    int add(Student student);

    int update(Student student);

    int deleteBysno(String sno);

    List<Map<String, Object>> queryStudentListMap();

    Student queryStudentBySno(String sno);
}